# Ammonia — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

For Ammonia, cas no. is 7664-41-7; cercla rq (lbs) is 100; regulatory categories is 1, verified against its source on 2026-08-05.

- **Substance:** Ammonia _(verified: appears in the quote below)_
- **CAS No.:** 7664-41-7 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 100 _(verified: appears in the quote below)_
- **Regulatory categories:** 1 _(verified: appears in the quote below)_
- **EPCRA TPQ (lbs):** 500 _(per ecfr.gov, not stated by the source above)_
- **EPCRA RQ (lbs):** 100 _(per ecfr.gov, not stated by the source above)_

## What the source says

> Ammonia | 7664-41-7 | 1 | | 100 (45.4)

## What ecfr.gov says

> 7664-41-7 | Ammonia | f | 100 | 500 |

Source: https://www.ecfr.gov/current/title-40/chapter-I/subchapter-J/part-355

## Source

- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-J/part-302/section-302.4
- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-J/part-355

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)](https://referencesource.org/chemical-regulatory-reporting-thresholds/).